1 | /* SPDX-License-Identifier: BSD-2-Clause */ |
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2 | |
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3 | /* PCI Help function, iterate all PCI device children of PCI bus. |
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4 | * |
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5 | * COPYRIGHT (c) 2010 Cobham Gaisler AB. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions |
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9 | * are met: |
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10 | * 1. Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include <pci/cfg.h> |
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30 | |
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31 | /* Iterate over all PCI devices on a bus (not child buses) and call func(), |
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32 | * iteration is stopped if a non-zero value is returned by func(). |
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33 | * |
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34 | * search options: 0 (no child buses), 1 (depth first), 2 (breadth first) |
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35 | */ |
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36 | int pci_for_each_child( |
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37 | struct pci_bus *bus, |
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38 | int (*func)(struct pci_dev *, void *arg), |
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39 | void *arg, |
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40 | int search) |
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41 | { |
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42 | struct pci_dev *dev = bus->devs; |
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43 | int ret; |
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44 | |
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45 | while (dev) { |
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46 | ret = func(dev, arg); |
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47 | if (ret) |
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48 | return ret; |
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49 | if (search == SEARCH_DEPTH && (dev->flags & PCI_DEV_BRIDGE)) { |
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50 | ret = pci_for_each_child((struct pci_bus *)dev, |
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51 | func, arg, search); |
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52 | if (ret) |
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53 | return ret; |
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54 | } |
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55 | dev = dev->next; |
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56 | } |
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57 | |
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58 | return 0; |
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59 | } |
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